Drying machine



June '2, 1925.

J; M. CAVITCH DRYING MACHINE Filed July 6', 1925 Jam/achyw/ mlveuron ATTORNEY UNITED STATES PAT Em times..-

JOHNM. CAVITCH, OF MUNIEJNG; MICHIGAN.

To all whom it may concern:

Be it. known that I, JOHN a citizen ofthe l\lu111Sl11g','l11 the a I ravine- MACHINE.

mman filed m a,

K M; GAVITCH, United States; resid ng at county of Alger and State of Michigan, have invented new and useful Improvementsin- Drying. Machlnes, of

which the follow ing is a specification.

This invention relates to a: drying, ma-. chine, and an object of the invention isto provide a. machine particularly designed for drying: wood; veneer and variousother arti:

cles, and an obj ect of the invention is to.

provide a drying machine whichwill utilize air passing at; a relativelyqhlghrateofspeed through the dryer, for'removing; the moisture from vari'o dryer.

us articleswplaced in. the

Another object of this invention is; to provide a. dryer structure as specified which is particularly adaptable for usecin drying veneer, rolling'ipin blocks; short. lumber, butter moulds, shells and handles, potato mashers and vari ouszother articles of wooden to prevent such found" that: even tirely eliminate of the-wood.

In the present checking. but it, has been this practice. 'does; not enthe checking or cracking centrifugal drying machine which utilizes air as the drying; agent all checking and wa nated and it has rping of; the wood. is. elimibeen'rfound that the: wood may be thoroughly dried ina muchshorter time than is required dryers of the type above specified;

A further obj ect: of this invention is to provide a rotary dryer which 1s-designed to increase the velocity of the air passing therethrough, which increasing the velocity of the .air is: caused through the formation of novel air inlets and air guidingblades or vanes within the dryer which guide the air through the dryer and" tangentially from the clrcumference of the dryer during its rotation, resulting in BfiGCtlVQ and ether ent drying of t dryer;

he material placed in the 1923.. Serial No. 649,937.

Other objectsof the invention will appear in the following detailed description'taken in connection with theaccompanying drawings wherein i Fig; 1 is a. top plan of the improved dryer. 3 v Fig. 2 is a vertical section through the dryer takenonthe line 2+2zof'l lig. 1-.

'Refe-rringmore particularly tothe draw ings, the improved centrifugal drying-ma:- chine comprises a bed: plate 1 which. is anchored by suitable anchoring bolts 2' to a suitable cementitious fou11darion.3 The bed plate 1 is circular or ring-like in: shape and is provided With an annular raceway 4 in its upper. face in which. bearing rlollers 5 are 'mounted; The. bearing; rollers 5" en-. gage in an annular. raceway 6 formed; in the under surface of, the rim? of the rotany carrier; of the dryer structure. The rim-..7 iskconnected. to the hub; 8 by suitable. Spokes 9 which may be bolted or'otherwise suitably attached to therim andthe;.hub.-. The rim has a. beveled gear- 10 formed; on its under surface adjacent its. perimeter, which beveled gear meshes with a beveledgear: 11 mounted upon the driving shaft 12; The driving shaft 12 is supported'by suitable bearings 13 and may be driven from: anysuitable power source through the medium of any suitable power transmitting mecha: nism. I

The central shaft 14 of: the rotary dry-er extends axially through. the huloi- 8: and through a bearing collar" 15,. as. clearly shown in Fig. 2. of the drawings and: it has collars 16 and17 attaohed thereto; adjacent its lower and upper ends respectively; A plurality of. spokesvlS; are; connected; to the flange 19 formed on the collar 171' and these spokes 18 radiate from the axis.- of the shaft 14 and are connected in. any= suitable manner to. vertical channel irons'20. The vertical channel irons 2.0 have their lower ends angled as shown? at: 21 andxattached to the rim 7 by cap screws; 22- or in, any other approved manner. A relatively. heavy mesh screen 23 is attached to: the channel irons and formsthe sides ofi the basket of the rotor." The channeliirons arebraeed 105 at spaced verticalpoints hyannular; rods-'24:

A pair of sp0kes18', namely those indie cated-by 18' in the. drawings, haveextensions 25 formed thereon which-project: begyond'the perimeter; of the basket structure of the rotor, which have air guiding plates 26 attached thereto. The air guiding plates 26 are also attached to the spokes 18 next to the spokes 18, as clearly shown inFig. 1 of the drawings, and they curve vconvexly and extend tangentially from the perimeter of the rotor. The guides 26 extend the full height of the rotor and their lower ends are braced and supported by suitable bracing and supporting rods 27. The guides 26 are adapted todirect air inwardly into the has ket or rotor of the dryer during rotation of the latter, which air passing in its bisecting curved path relative to the perimeter of the rotor will strike the speed increasing and deflecting blades 28, and these blades will alter the path of the air and increase its velocity at its outlet from the basket, owing to the fact that the blades extend substantially straight for the major portion of their lengths and the air entering the rotor in the path directed by the guides 26 willstrike againstthe straight portions of the blades and travel there along, during rotation of the basket, for a short distance, after which it'will be directed by the relatively sharp curved portions 29 of the blades, in a-sharply. turned path tangentially of the circumference of the basket and project from the basket at a highly increased velocity causing substantially a vacuum pull through the basket which will draw moisture out of any wooden articles or pieces of wood or similar material in the-basket. The blades 28 are braced by suitable braces 80, V

The guides or wings 26 are adjustable at their free edges by means of thenuts 31 which-are threaded upon the extensions and brace rods 27 so as to permit'adjustment of the mouth or inlet formed by the guides so as to direct the proper volume of air at the required speed into and through the basket during rotation thereof. The air action above specified causes a sifonic action on the pores of the wood, holding the pores opened while the centrifugal force caused by the rotation of the basket will throw the moistureto the surface of the wood. The

' strong suction created by the sharp curves ture is exhausted from the wood and when on the blades 28 will carry the moisture away from the surfaces of the wood and from the machine. In operation, the machine should be rotated until all the moisthe pores of the wood at the surface are closed to such an extent as to prevent the proper action of the air thereon and such surface dried wood must however, be dried by a steam process to reopen the surface pores after which it can be'dried in the present centrifugal dryer.

Thewooden ware or articles to be dried are placed withinthe basket upon the spokes 9 and rim 7 or upon any suitable platform that may be placed therein. 7 It will be apparent that any number of articles or quantity-of wood may be dried and it will not benecessary to wait until a sufiicient quantity has accumulated for drying to completely fill the dryer structureas is necessary with the present approved'type of drying kilns or steam dryers now in use. It will also be apparent that the material to be dried need not be neatly stacked within the basket but maybe placedtherein in any desired manner. I Y

It is, of course, to be understood that'the invention may be constructed in other manners and the parts associated in different relations and, therefore, I donot desireto be limited in any manner except as setforth in the claims hereunto appended.

Having thus described my invention what Iclaimis:- e L -1.. A dryer comprising a foraminous article containing basket, air guide plates carried by the basket. at diametrically opposed points and curving inwardly for guiding air into the basket, and means for adjust-ably supportingthe mouthed edges of said guide plates. 1; A. v 2. A dryer comprisinga basket'ha-ving foraininous sides, means for rotating said basket about a vertical axis, means for directing air tangentially into the basket, and air guiding plates within the basket for directing the air outwardly from the basket in streams tangentially of the perimeter of the disc;

3. A dryer conmprising an article containing basket, means for directing'air into the basket, andair guiding blades within the basket for directing the air out of the basket in paths tangentially of theperim- 1 eter of the basket. I a

4:. A dryer comprising an article containing basket, means for directing air into the basket, air guiding blades within the basket for directing the air out of the basket in paths tangentially of the perimeter of the basket, means for rotating said basket, said blades being shaped whereby the velocity of the outcoming air from the basket will be materially increased over the velocity of the air entering the basket.

5. A dryer comprising a foraminous article containing basket, means for rotating said basket, and air guiding plates carried by the basket at diametrically op osed points and curving inwardly substantially tangentially of the perimeter of the basket for guiding air into the basket.

6. A dryer comprinsing a foraminous article containing basket, means for rotating said basket, air guiding plates carried by the basket at diametrically opposed points and curving inwardly substantially tangentially of the perimeter of the basket for guiding air into the basket, and means for adjustably supporting the mouth edges of said air guiding plates.

7. A dryer comprising a foraminous article containing basket, means for rotating said basket, air guiding plates carried by the basket at diametrically opposed points and curving inwardly substantially tangentially ot' the perimeter of the basket for guiding air into the basket, and air guiding blades within the basket and shaped to receive the air guided into the basket by said blades and said basket, air guiding plates carried by the basket at diametrically opposed points and curving inwardly substantially tangentially of the perimeter of the basket for guiding air into the basket, air guiding blades Within the basket and shaped to receive the air guided into the basket by said blades and direct it out of the basket in sharp curved paths tor increasing the velocity of the out going air over the velocity of the incoming air, and means for adjustably supporting the mouth edges of said air guiding plates.

In testimony whereof I aflix my signature.

JOHN M. GAVITOH. 

